| Autor: |
Lee, Kang H., Hui, Kok P., Chan, Tiong B., Tan, Wan C., Lim, Tow K. |
| Zdroj: |
Chest; February 1994, Vol. 105 Issue: 2 p540-543, 4p |
| Abstrakt: |
This was a prospective study of 52 patients that were extubated in our medical intensive care unit. Rapid shallow breathing, represented by a ratio of frequency to tidal volume (f/Vt) of more than 105, was evaluated either on continuous positive airway pressure or pressure support prior to extubation as a marker of extubation outcome. Twelve out of 13 patients (92 percent) with rapid shallow breathing (f/Vt ratio > 105) were successfully extubated. Out of 9 extubation failures only 1 patient had a f/Vt ratio more than 105 (11 percent). A measured f/VT ratio of less than 105 had a sensitivity and specificity of 72 and 11 percent, respectively, for extubation success. Patients who had unsuccessful outcomes were ventilated for a significantly more prolonged period (9.6 ± 6.8 d vs 4.6 ± 3.9 d, unpaired ttest, p = 0.004). We conclude that the presence of rapid shallow breathing during a weaning trial with the patient on partial ventilatory support does not necessarily preclude successful extubation. |
| Databáze: |
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